DOI: 10.1002/2015GL065746
论文题名: First measurement of the displacement rate of the Pacific Plate near the Japan Trench after the 2011 Tohoku-Oki earthquake using GPS/acoustic technique
作者: Tomita F. ; Kido M. ; Osada Y. ; Hino R. ; Ohta Y. ; Iinuma T.
刊名: Geophysical Research Letters
ISSN: 0094-9187
EISSN: 1944-8918
出版年: 2015
卷: 42, 期: 20 起始页码: 8391
结束页码: 8397
语种: 英语
英文关键词: oceanic plate
; postseismic deformation
; seafloor geodesy
; subduction rate
; the 2011 Tohoku-Oki earthquake
Scopus关键词: Couplings
; Deformation
; Earthquakes
; Geodesy
; Geodetic satellites
; Viscoelasticity
; 2011 Tohoku-Oki earthquakes
; Oceanic plate
; Postseismic deformation
; Seafloor geodesy
; Subduction rates
; Geophysics
; acoustic equipment
; continental crust
; deformation mechanism
; displacement
; earthquake rupture
; geodesy
; GPS
; measurement method
; North American plate
; oceanic crust
; Pacific plate
; plate motion
; postseismic process
; seafloor
; subduction
; Tohoku earthquake 2011
; viscoelasticity
; Japan Trench
; Pacific Ocean
英文摘要: The subduction rate of an oceanic plate may accelerate after large earthquakes rupture the interplate coupling between the oceanic and overriding continental plates. To better understand postseismic deformation processes in an incoming oceanic plate, we directly measured the displacement rate of the Pacific Plate near the Japan Trench after the 2011 Tohoku-Oki earthquake using a GPS/acoustic technique over a period of 2 years (September 2012 to September 2014). The displacement rate was measured to be 18.0 ± 4.5 cm yr-1 (N302.0°E) relative to the North American Plate, which is almost twice as fast as the predicted interseismic plate motion. Because the sum of steady plate motion and viscoelastic response to the Tohoku-Oki earthquake roughly accounts for the observed displacement rate, we conclude that viscoelastic relaxation is the primary mechanism responsible for postseismic deformation of the Pacific Plate and that significant subduction acceleration did not occur at least not during the observation period. Key Points Direct geodetic observations have been made on the Pacific Plate near the trench A high displacement rate was measured after the 2011 Tohoku-Oki earthquake Viscoelastic response following the earthquake probably causes the high displacement rate © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946606860&doi=10.1002%2f2015GL065746&partnerID=40&md5=11710f871e52825f14e9fba18b817046
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8803
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Graduate School of Science, Tohoku University, Sendai, Japan
Recommended Citation:
Tomita F.,Kido M.,Osada Y.,et al. First measurement of the displacement rate of the Pacific Plate near the Japan Trench after the 2011 Tohoku-Oki earthquake using GPS/acoustic technique[J]. Geophysical Research Letters,2015-01-01,42(20).